Tips of Calyxes turning dark/red/brown, why?

[elcoloan]

This plant is into her final days of week 5th of flowering. This week calyzes started swelling and then i noticed some calyxes started turning their tips into a dark/brownish color, but only on the highest part of the highest colas which are inevitably too close to the light and also show some heat stress. What shoudl i do? Is it just overfeeding symtoms showing in the calyxes?

Since i have burnt tips in most of the leaves and symptoms of N toxicity on the biger fan leaves, i assumed it's nute burn, but now I'm concerned it might be sysmtoms of something else because i read bud rot can start like that. I'm aware my RH is high but havent been able to lower it. was kinda hopping VPD would save me hehehe.

medium: coco coir
light: autocob 3500K
nutes: MC v1.0 and CalMag pro. Last few feeds at 1.1 EC and plan to lower to 1.0 EC and keep that as the max EC. max EC reached last weeks was 1.5.
RH 60-70%
Temp 18-22C

@Waira, i'd appreciate your input or any who can help.

@Mizzo81 @HemiSync ... i clearly went too far with the MC dosage.. should i lower beyond 1.0 EC / 500 ppm (hannah) to correct the overfeed? or if i lower to 1.0 it should be fine.

 

[namvet25]

Are you talking about the little brown tips on the pistols in the picture?

 

[elcoloan]

Are you talking about the little brown tips on the pistols in the picture?

nope, not the pistils... still all psitils are white and i know they will eventually dry and turni brown/orange. i mean the end/tip of the calyx... ill circle them in the picture:

 

[namvet25]

Don't worry about those,they should not cause any ill effects to the plant.Your plant looks great with great trychome coverage,should be a good smoker.

 

[AutoWonders]

Those look like very small leaves to me. It is more likely that the plant is simply in the "March to Death"

 

[elcoloan]

Those look like very small leaves to me. It is more likely that the plant is simply in the "March to Death"

Pic was the best i could take but I'm 99% sure they are calyxes, i'll try a better pic in the after noon. The dark tips do look pretty much identical to those on the sugary leaves nearby so i also considered them to be small curled up leaves showing overfeeding symptoms but they are swelling up each day and having a clear calyx shape... never had calyxes show brown tips so it scared me.

Already fed today with 350 pm / 0.7 EC no calmag pro... i have clear symptoms of overnute and N toxicity. Plan to do another feeding in the after noon with 0.5 EC and still no calmag.

 

[elcoloan]

@AutoWonders @namvet25 here are some better pics.

 

[Dewey Matter]

Looks purple and benign, often genetic and sometimes caused by cool temps (I bet the trichomes in that same area are taking up the color too) - nothing to worry about here.

 

[elcoloan]

Looks purple and benign, often genetic and sometimes caused by cool temps (I bet the trichomes in that same area are taking up the color too) - nothing to worry about here.

oooohhhhh some purple tones would be realy nice! never had a strain with purple calyxes!

thanks all for the input!!! will update in case in turns to be something bad.

 

[Waira]

those are tips of sugar leaves mate, and that's likely normal color expression starting now,...